[Gustomaximus]

Yep. Things helped me is to set some boundaries to ensure I do get some downtime. Also I select work that is more time flexible. Eg I do marketing so I prefer to get strategy/advertising/lead generation type gigs where I can work evening hours and not have to be on call. I avoid website development work, as much as I like that, it requires me to project mange people and be on call at short notice. Not sure how that translates in developer world, but it seems scope creep is the bigger issue for you, not the original job. A bit part is probably increasing the billing at a rate that motivates you for every extra component the client adds. It will also make them think about what they ask for more carefully than clients who just add random ideas.